Tarren y Bwlch Settlement
These four huts are found on sloping ground SW of Hirwaun (SN 9511 0351). The dating of this settlement is uncertain, it is possible that these huts were occupied from the Iron Age (600 BC – AD 100) to the Dark Age (AD 410 – 871). They all measure roughly 3m in diameter and are quite damaged and fairly scattered.
Ref. Royal Commission on Ancient and Historical Monuments in Wales : Glamorgan Vol.1 Part 2, The Iron Age and the Roman Occupation. 1976. Page 74 – 76.